Type 3361

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Operating limits for seat seal

Tight sealing required

Leakage class

(DIN EN 60534 - 4)

Medium temperature

Seat seal

No

An additional shut-off valve is

recommended

III/IV (metal seals)

Metal-sealed valves have larger

leakages (0.1 % or 0.01 %

of the nominal flow rate are

permissible).

Metallic seals are impervious

even under demanding process

conditions.

- 40…230 °C

Stainless steel

For particularly demanding

process conditions such as

cavitation, erosion by wet

steam or abrasive media, hard-

ened cones and seats, can be

used to significantly increase

the service life.

Hardened stainless steel

Yes

An additional shut-off valve is

often unnecessary.

VI (soft seals)

By using plastics as sealing

material, the control valves can

close tightly.

Their use is not recommended

in cases of increased erosion

due to demanding process

conditions.

- 40…130 °C

(recommended for ≤ 130 °C)

PTFE

- 10…230 °C

(recommended for > 130 °C)

PEEK

Operating limits for optional versions

High temperature version

By adapting the spindle sealing this version is suitable for applications with steam, neutral gases and other heat transfer mediums up

to 230 °C.

Drinking water version

Materials in contact with the medium are tested for suitability with drinking water up to 85 °C.

Vacuum version

Without leakage bore, this design is suitable for pressures down to - 0.9 bar(g).

Low temperature version

Suitable for minimum medium temperatures down to - 40 °C

Version for oxygen

Non-metallic materials in contact with the medium are tested for suitability with oxygen. Suitable for operating pressures up to

25 bar(g) and medium temperatures up to 60 °C.